<template>
  <view>
    <my-search  @click="gotoSearch"></my-search>
    <view class="scroll-view-container">
      <scroll-view scroll-y="true" class="left-scroll-view" :style="{height:wh+'px'}" >
        <block v-for="(item,index) in cateList.value" :key="index">
          <view :class="['left-scroll-view-item',index===active? 'active':'']" @click="activeChanged(index)">{{item.cat_name}}</view>
         </block>
      </scroll-view>
      <scroll-view scroll-y="true" class="right-scroll-view" :style="{height:wh+'px'}" :scroll-top="scrollTop">
         <view class="cate-lv2" v-for="(item2,i2) in cateLevel2.value" :key="i2">
           <view class="cate-lv2-title">----- {{item2.cat_name}} -----</view>
           <view class="cate-lv3-list">
             <view class="cate-lv3-item" v-for="(item3,i3) in item2.children" :key="i3" @click="gotoGoodsList(item3)">
               <image :src="item3.cat_icon.replace('dev','web')"></image>
               <text>{{item3.cat_name}}</text>
             </view>
           </view>
         </view>
      </scroll-view>
    </view>
  </view>
</template>

<script setup>
  import {reactive,ref,defineProps} from 'vue'
  import {moduleCart}  from '../../store/cart.js'
  import {onLoad,onReachBottom,onPullDownRefresh,onShow} from '@dcloudio/uni-app'
  
  const cartList=moduleCart()
  const setBadge=()=>{
    uni.setTabBarBadge({
      index:2,
      text:cartList.total+''
    })
  }
  
  onShow(()=>{
     setBadge()
  })
  
  
  
  const wh=ref(uni.getSystemInfoSync().windowHeight-50)
  const cateList=reactive([])
  const active=ref(0)
  const cateLevel2=reactive([])
  const scrollTop=ref(0)

  
  const getCateList=async()=>{
        const { data: res } = await uni.$http.get('/api/public/v1/categories')
        if (res.meta.status !== 200) return uni.$showMsg()
        cateList.value = res.message
        cateLevel2.value=res.message[0].children
  }
  
  const activeChanged=(index)=>{
    active.value=index
    cateLevel2.value=cateList.value[index].children
    scrollTop.value=scrollTop.value===0?1:0
  }
  
  const gotoGoodsList=(item3)=>{
    uni.navigateTo({
      url:'/subpkg/goods_list/goods_list?cid=' + item3.cat_id
    })
  }
  
  const gotoSearch=()=>{
    
    uni.navigateTo({
      url:"/subpkg/search/search"
    })
  }
  
  getCateList()
 
</script>

<style lang="scss">
.scroll-view-container{
  display: flex;
  .left-scroll-view{
    width: 120px;
    .left-scroll-view-item{
      line-height: 60px;
      background-color: #f7f7f7;
      text-align: center;
      font-size: 12px;
      
      &.active{
        background-color: #ffffff;
        position: relative;
        
        &::before{
          content: ' ';
          display: block;
          width: 3px;
          height: 30px;
          background-color: #c00000;
          position: absolute;
          left: 0;
          top: 50%;
          transform: translateY(-50%);
        }
      }
    }
  }
}
.cate-lv2-title{
  font-size: 12px;
  font-weight: bold;
  text-align: center;
  padding: 15px 0;
}

.cate-lv3-list{
  display: flex;
  flex-wrap: wrap;
  .cate-lv3-item{
    width: 33.33%;
    margin-bottom: 10px;
    display: flex;
    flex-direction: column;
    align-items: center;
    image{
      width: 60px;
      height: 60px;
    }
    text{
      font-size: 12px;
    }
  }
}
</style>
